netty-codec-http: Netty: Data manipulation via request-boundary confusion in HttpObjectDecoder

A flaw was found in Netty. The HttpObjectDecoder component, which processes incoming HTTP requests, incorrectly skips certain control characters and whitespace before reading the first request line. This behavior, which goes beyond standard HTTP protocol requirements, can lead to request-boundary...

HTTP Request Smuggling

Netty is vulnerable to HTTP Request Smuggling. The vulnerability is due to HttpObjectDecoder improperly ignoring non-CRLF control characters before the request line, which allows an attacker to create request-boundary confusion between front-end and back-end components and potentially smuggle...

CVE-2026-50020

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, HttpObjectDecoder skips every byte for which Character.isISOControlb is true 0x00–0x1F and 0x7F as well as all...

CVE-2026-50020 Netty's HttpObjectDecoder skips arbitrary initial control characters when only initial CRLF characters are permitted

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, HttpObjectDecoder skips every byte for which Character.isISOControlb is true 0x00–0x1F and 0x7F as well as all...

CVE-2026-50020

Netty (network framework) contains a flaw in HttpObjectDecoder: prior to reading the first request-line, it ignores all ISO control bytes (0x00–0x1F, 0x7F) plus whitespace, beyond what RFC 9112 allows. This can cause request-boundary confusion in pipelined or multiplexed transports. Affects Netty...

PT-2026-48904

Name of the Vulnerable Software and Affected Versions Netty versions prior to 4.1.135.Final Netty versions prior to 4.2.15.Final Description Before reading the first request-line, the HttpObjectDecoder function silently skips all whitespace and every byte for which Character.isISOControlb is true...

Linux Distros Unpatched Vulnerability : CVE-2026-50020

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the...

GHSA-Q382-VC8Q-7JHJ Improper handling of null Unicode character when parsing JSON in github.com/modelcontextprotocol/go-sdk

The Go SDK recently transitioned to the segmentio/encoding library for JSON parsing in version 1.3.1. While this change addressed both case-insensitivity and ASCII folding issues, the new parser implemented aggressive key matching that treated keys with null Unicode characters appended at the end...

FreeBSD : amavisd-new -- multipart boundary confusion (0a48e552-e470-11ee-99b3-589cfc0f81b0)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 0a48e552-e470-11ee-99b3-589cfc0f81b0 advisory. - The Amavis project reports: Emails which consist of multiple parts Content-Type: multipart/ incorpora...

Key Boundary Confusion

wolfssl is vulnerable to Key Boundary Confusion attack. The vulnerability is due to wolfSSL failing to enforce boundaries between DTLS messages handled by different keys, allowing for the amalgamation of messages meant for different security contexts into a single record...